Polynomial expansion of the precoder for power minimization in large-scale MIMO systems

This work focuses on the downlink of a single-cell large-scale MIMO system in which the base station equipped with M antennas serves K single-antenna users. In particular, we are interested in reducing the implementation complexity of the optimal linear precoder (OLP) that minimizes the total power...

Full description

Saved in:
Bibliographic Details
Published in:IEEE International Conference on Communications (2003) pp. 1 - 6
Main Authors: Sifaou, Houssem, Kammoun, Abla, Sanguinetti, Luca, Debbah, Merouane, Alouini, Mohamed-Slim
Format: Conference Proceeding Journal Article
Language:English
Published: IEEE 01.05.2016
Subjects:
Antennas
Asymptotic properties
Channels
Complexity
Complexity theory
Electronics
Interference
Mathematical models
MIMO
MIMO (control systems)
Minimization
Optimization
Polynomials
Precoding
Signal to noise ratio
ISSN:1938-1883
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This work focuses on the downlink of a single-cell large-scale MIMO system in which the base station equipped with M antennas serves K single-antenna users. In particular, we are interested in reducing the implementation complexity of the optimal linear precoder (OLP) that minimizes the total power consumption while ensuring target user rates. As most precoding schemes, a major difficulty towards the implementation of OLP is that it requires fast inversions of large matrices at every new channel realizations. To overcome this issue, we aim at designing a linear precoding scheme providing the same performance of OLP but with lower complexity. This is achieved by applying the truncated polynomial expansion (TPE) concept on a per-user basis. To get a further leap in complexity reduction and allow for closed-form expressions of the per-user weighting coefficients, we resort to the asymptotic regime in which M and K grow large with a bounded ratio. Numerical results are used to show that the proposed TPE precoding scheme achieves the same performance of OLP with a significantly lower implementation complexity.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Conference-1
ObjectType-Feature-3
content type line 23
SourceType-Conference Papers & Proceedings-2
ISSN:1938-1883
DOI:10.1109/ICC.2016.7510948